import java.util.Scanner;

public class Work2 {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        System.out.print("请输入千克数: ");
        double kg = scanner.nextDouble();
        double pounds = kg / 0.4535924;
        System.out.printf("%.2f 千克等于 %.2f 磅\n", kg, pounds);
        scanner.close();
    }
}